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Re: st: loop to rename vars


From   Steven Samuels <sjhsamuels@earthlink.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: loop to rename vars
Date   Fri, 10 Oct 2008 15:31:03 -0400

which renvars
c:\ado\plus\r\renvars.ado
*! 2.2.1  15aug2000  Jeroen Weesie/ICS

I guess checking SSC would have taken too much effort.

-Steve
On Oct 10, 2008, at 2:46 PM, Nick Cox wrote:

You can try it and see how smart the authors were (on this point).

Nick
n.j.cox@durham.ac.uk

Sergiy Radyakin

On Fri, Oct 10, 2008 at 2:26 PM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
You don't need to fire up -ds- beforehand. This can thus be reduced to

local i = 1
foreach var of var * {
       ren `var' var`i'
       local ++i
}

In fact you don't need a loop. With -renvars- from the Stata Journal
(-search renvars- for location) you can go

renvars \ var1-var`c(k)'

What if var5 already exists (and it is 10th in order). Will -renvars-
be intelligent enough to sense it and adjust numbering accordingly? or
will it just crash with error 110 after renaming the fifth variable?


c(k) is held by Stata as the number of variables -- see results of
-creturn li- and it has a local macro persona `c(k)'.

Naturally -renvars- is doing the loop on your behalf. It also checks
for
name problems.

If Mai does not want all variables renamed, then the advice is
modified
accordingly.

Nick
n.j.cox@durham.ac.uk

Friedrich Huebler

ds
local i = 1
foreach var of varlist `r(varlist)' {
 ren `var' var`i'
 local ++i
}


On Thu, Oct 9, 2008 at 11:31 PM, mai7777 <mai7777@gmail.com> wrote:

How can I loop over vars to rename them by their order number.
so they become var1, var2, var3...?

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